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Iso 1183 1 done

  1. 1. Normen-DownIoad-Beuth-Kabdwa! Baok Intemational Plot No.179;0-42 Raigad CuHKdN’. 70428654ftIr.5476745an1-2011-09-26 09:55 INTERNATIONAL ISO STANDARD 1183-1 Firsî ediflon 2004-02-01 Plastics — Methods for determining the density of non-cellular plastics — Part1: _ Immersion metho. d, Iiquid pyknometer method and titration method Plastiques — Méthodes de détehnination de la masse volumique des plastiques non alvéolaires - Parfie 1: Méthode par immersion, méthode du pycnomètre en milieu liquide et méthode par titrage Reference number a: E ISO 1183-1:2004(E) <9 ISO 2004
  2. 2. Mormen-DownIoad-Boum-Kabdwal Book lntcmatîonal Plat No.179;D-42 Raigad C. .—KdNr.70428,65-LflIln54767450a1-Z011-09-28 09:55 ISO 1183—1:2004(E) PDF dlsolalmer Thls PDF file may contaìn embedded typefaces. In aooordanoe with Adobe's Iicerìsing policy. this file may be printed or viewed but shall no: be edited unless the typefaoes which are embedded ate Iicensed to and inslalled on the computer performing the-editing. In downloadlng this file, parties acoept therein the responslbility of not infringing Adobe's Iicensing policy. The ISO Central Seoretariat aocepts no Iiability in this area. Adone is a trademark of Adobe Systems Inoorporated. Detailslof the software produots used to create thIs PDF file can be found in the General Info relative to the file; the PDF-creation parameters were optimized fior printing. Every care has been taken to ensure that the file is suitable for use by ISO member bodìes. In the unlikely event that a problem relating to it is found, please inform the Centra] Secretariat at the adctress given below. O ISO 2004 AII rights resetved. Unless otrtetwise specified, no part of thls publication may be reproduoed or utilized in any fonn or by any means, electronic or mechanìcal, including photooopying and mìcrofilm, without permission in writing from either ISO at the address below or ISO's member body in the oountry of the requester. iSO copyright office Case postale 56 o CH-1211 Geneva 20 Tel. + 4122 749 O1 11 Fax + 4122 749 09 47» E-mait oopyright@lso. org Web www. ìso. org Publishegi in Switzerland ii © ISO 2004 -AIl rights reserved
  3. 3. Normen-DownIaad-Eeum-Kabdwal Boak lntemational P10: No.179;D—42 Raigad C. .-KdNI.7042365-LÎNL5476745001-2011-09-25 09:55 ISO 11 83-1 :2004(E) Contents Page Foreword Scope . ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... . . . 1 . ‘2 Normative references . ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... . . .1 3 Tenns and definitions . ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... . . . 2 4 Conditioning . ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... .. 2 5 Methods . ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... .. . . 3 5.1 Method A — Immersion method . ... ... ... . . . 3 5.2 Method B — Liquid pyknometer method. .. 5 5.3 Method C — Titration method . ... . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 6 6 Correction for buoyancy in air. . . ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... . . . 7 7 Test report . ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... .. 8 Annex A (informative) Liquid systems suitable for use in Method C . ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... .. 9 © ISO 2004 — AII rights reserved iii
  4. 4. Normen-DawnIoad-Bouthwabdwal Book Infamatîanal Ptot No. 1794:0442 Raigad C. .-KdNr‘. 7042865-Lmn5476745001-2011-09-26 09:55 ISO 1 1 83-1 :2004(E) Foreword ISO (the International Organization for Standardization) ìs a worldwide federatìon of national standards bodies (ISO member bodies). The work of preparing International Standards is normally oarried out through ISO technical committees. Each member body Interested In a subject for which a technicat committee has been established has the right to be represented on that committee. Intemational organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. ISOcoIIaborates closely with the Intemational Electrotechnical Commission (IEC) on aII matters of electrotechnìcal standardization. Internatìonfial Standards are drafted in accordance wlth the ruIes given in the ISOIiEC Directives, Part 2. The main task of technìcal committees is to preparo Intemationat Standards. Draft International Standards adopted by the technical committees are cìrculated to the member bodies for voting. Publication as an Intemational Standard requires approval by at Ieast 75 % 0t the member bodies casting a vote. Attention is drawn to the possibìlity that some of the etements of this document may be the subject of patent rights. ISO shall not be hetd responsìble for identifyìng any or aII such patent rights. . ISO 1183-1 was prepared by TechnicaI Committee ISOl’I'C 61, Plastics, Subcommittee SC 5, Physical- chemical properties. Together with the other parts (see below). this part of ISO 1183 cancels and replaces ISO 1183:1987, which has been technically revised. ISO1183 consiste of the foIIowing parts. under the generaI titIe Plastics — Methods for determining the density of non-cellular plastics: - —- Part‘ 1: Immersion method, Iiquid pyknometer method and titration method‘ A — Part2: Density gradient column method — Part 3: Gas pyknometer method iv . o ISO 2'004 — Alt rights reserved
  5. 5. Narrnen-Download-Beuth-Kabdwal Baok Interna tìonal PIot No.179;D-42 Raigad C. .-KdNr.7042865-Lmrt5476745001-2011-09-26 09:55 INTERNATIONAL STANDARD ISO 1183-1:2004(E} — Plastics — Methods for determining the density of non-cellular plastics — ' Part1:' Immersion method, liquid pyknometer method and titration method I WARNING—-The use of this part of ISO1183 may involve hazardous materiale, operations or equipment. This part of ISO1183 does not purport to address aII of the safety problems, if any, _associated with its use. It is the responsibility of the user of this part of ISO 1183 to establìsh appropriate health and safety practices and to determine the applicability of any regulatory Iimitations prior to use. 1 Scope This part of ISO 1183 specifies three methods for the determination 0t the density of non-cellular plastics in the form 0t void-free moulded or extruded objects, as well as powders, flakes and granules. — Method A: Immersion method. for solid plastics (except for powders) in void-free form. — Method B: Liquîd pyknometer method, for particles, powders, flakes, granules or small pieces of finished parts. i r— Method C: Titration method, for plastics in any volo-free form. NOTE Thìs part of ISO 1183 is applioable to pellets as Iong as they are void-free, Density is frequently used to follow variations in physical structure or composition of plastic materiale. Density may also be useful in assessing the uniformity of samples or specimens. Often the density of plastic materials wiII depend upon the choìce of specimen preparation method. When this is the case, precise details of the specimen preparation method wiII have to be included in the appropriate material specification. This note is applicable to aII three methods. 2 Normative references The following referenced documents are indìspensable for the application of this document. For dated reterences, only the edition cited applies. For undated references. the Iatest edition of the referenced document (including any amendments) applies. ISO 31-3, Quantities and units -— Part 3: Mechanics IISO 291 :1997, Plastics — Standard atmospheres for conditioning and testing ISO 1172:1999, Plastics — Vooabulary © ISO 2004 — AII rights reserved 1
  6. 6. ISO 1183—1:2004(E) 3 Terms and definitions For the purposes of this document, the terms and definitions given in ISO 472 and the following apply. 3.1 mass quantity of matter contained in a body NOTE It is expressed in kilograms (kg) or grams (g). 3.2 apparent mass mass of a body obtained by measuring its weight using an appropriately calibrated balance I NOTE It is expressed in kilograms (kg) or grams (g). Normen-Downlnad-Beuth-Kabdwal Book lntematîanal Plot No.179;D—42 Raîgad ca-KdNr.7042865-L! Nr.5476745001-2011429-26 09:55 3.3 density p . . the ratio of the mass m of a sample to its volume V (a: the temperature t), expressed in kglm3, kgldm3 (g/ cm3) or kgll (g/ ml) NOTE _ - The following terms, based upon ISO 31-3, are given here for clarification. Table 1 — Density terms OOO . kg/ m’ Density p mlV kgldm3 (g/ cm3) kg/ Kg/ mt) The test atmosphere shaII be in accordance with ISO 291. In general, oonditioning specimens to constant ma/ kg dm3lkg (cm3/g) temperature is not required, because the determination itself brings the specimen to the constant temperature of the test. Specific volume llkg(mllg) 4 Oonditîoning Specimens which change in density during the test to such an extent that the change is greater than the required accuracy shall be conditioned prior Io measurement in accordance with the applicable material speciflcation. When changes in density with time or atmospheric conditions are the primary purpose of the measurements, the specimens shaII be conditioned as described in the materia! specification and, if no material specification exists, then as agreed upon by the interested parties. 2 o ISO 2004 - AII rìghls reserved
  7. 7. Normen-DownkzacbBeum-Kabdwal Book lntvemationa! Plol No.179;D-42 Raigad C. .-KdNr. 7042865-LfNI. 5476745001401 1-09-26 09:55 ISO 1183-1:2004(E) 5 Methods ‘ 5.1 Method A ——— Immersion method v5.1.1 Apparatus 5.1.1.1 Analytìcal balance or instrument specificaliy designed for measurement of density, accurate to 0,1 mg. NOTE An automatically operating instrument may be used. The calculation of density may be done automatically using a computer. — 5.1.1.2 Immersion vessel: a beaker or other wìde-mouthed containerof suitable size tor holding the immersion Iiquid. ‘ 5.1.1.3 Stationary support, e. g. a pan straddle, to hold the immersion vessel above the balance pan. 5.1.1.4 Thermometer, graduated at 0,1 °C intervals, covering the range 0 “C to 30 °C. 5.1.1.5 Wire (if required), corrosion-resistant, of diameter not greater than 0,5 mm, for suspending specimens in the immersion Iiquid. ' 5.1.1.6 Sinker, of suitable mass to ensure complete immersion 0t the specimen, for use when the density 0_f the specimen is Iess than that of the immersion Iiquid. 5.1.1.7 Pyknometer, with a side-arm overflow capillary, for determining; the density of the immersion ‘Iiquid when this Iiquid is not water. The pyknometer shali be equipped with a thermometer graduated at 0,1 °C intervals from 0 °C to 30 °C. 5.1.1.8 Liquid bath, capable of being thermostaticaily controlled to within i 0,5 °C. for use in determining the density of the immersion Iiquid. 5.1.2 Immersion iiquid . Use freshly distilled or deionized water or another suitable Iiquid containing not more than 0,1 % of a wetting agent to help in removing air bubbles. The Iiquid or solution with which thespecimen comes into contact during the measurement shaII have no efiect on the specimen. The density of immersion tiquids other than distilled water need not be measured provided they are obtained from an accredited source and are accompanied by certificate. _ 5.1.3 specimens specimens may be in any void-free form except for powder. They shaII be of a convenient size to give adequate clearance between the specimen and the immersion vessel and should preferably have a mass of at ieast1 g. When cutting specimens from Iarger samptes, proper equipment shaII be used to ensure that the characteristics of the material do not change. The surface of the specimen shaII be smooth and free from cavìties to minimize the entrapment of air bubbles upon immersion-in the Iiquid, otherwise errors wiII be introduced. 5.1.4 Procedure 5.1.4.1 Weigh the specimen in air while suspended with a wire or maximum diameter 0,5 mm. Weigh specimens of mass Iess than or equal to 10 g Io the nearest 0,1 mg. Weigh those 0t mass greater than 10 g to the nearest 1 mg. Record the mass of the specimen. o ISO 2004 — AII rights reserved . 3
  8. 8. Normen-Downtoad-Beuth-Kabdwal Book lntematianal Plor No. 179x342 Raîgad’ C. .-KdNr.7042865-LflVn5476745001-2011-09-26 09:55 ISO 11034200405) 5.1.4.2. immerse the specimen, stili suspended by the wire, in the immersion Iiquid (5.1.2), contained in the immersion vessel (5.1.1.2) on the support (5.1.1.3). The temperature of the immersion Iiquid shaII be 23 °Ct2°C (or 27 °Ci2 °C). Remove any adhering air bubbles with a fine wire. Weigh the immersed specimen to the nearest 0,1 mg. -- If the measurement is carried out in a temperature-controlled room, the temperature of the whole apparatus, incIuding'the immersion Iiquid, shaII be within the range 23 °C i: 2 °C (or 27 °C i 2 °C). 5.1.4.3 lf necessary, determine the density of immersion Iiquids other than water as follows. Weigh the pyknometer (5.1.1.7) empty and then containing freshly distilled or deionized’ water at a temperature of 23 °C i 0,5 °C (or 27 °C i 0,5 °C). Weigh the same pyknometer, after cleaning and drying, filled with the immersion Iiquid {also at a temperature of 23 °'C 1: 0,5 °C (or 27 “C i 0,5 °C)]. Use the Iiquid bath (5.118) to bring the water and immersion Iiquid to the correct temperature. Calculate the density p, ,_, in grams per cubic centimetre, of the immersion Iiquid al 23 °C (or 27 °C), using the equation: PIL = flxpw I (1) . mw -where m“: is the mass, in grams, of the immersion Iiquid; mw is the mass, in grams, of the water: pw is the density, in grams per cubic centimetre, of water at 23 °C (or 27 °C). 5.1.4.4 Calculate the density p3, in grams per cubic centtmetre, of the specimen at 23 . °C (or 27 °C), using the equation: - p5 = (2) '"S, A e mSJL where msA is the apparent mass, in grams, of the specimenin air; m3 lL is the apparent mass, in grams, of the specimen in the immersion Iiquid; p“_ is the density of the immersion Iiquid at 23 °C (or 27 °C), in grams per cubic centimetre, as stated by the supplier or determined as specified in 5.1.4.3. For specimens having a density less than that of the immersion Iiquid, the test may be performed in exactly the same way as desoribed above, with the following exception: a sinker of Iead or other dense material is attached to the wire, such that the sinker rests below the Iiquid Ievel, as does the specimen, during immersion. The sinker may be considered as a part of the suspension wire. In this case, the upthrust exerted by the immersion Iiquid on the sinker shall be allowed for by using the following equation, rather than Equation (2), to calculate the density of the specimen: , , = __L. A.’. ”L____ I , (3, S msA + mKrr. "’"S+K, IL where mK "_ is the apparent mass, in grams, of the sinker in the immersion Iiquid; . m5,, “ is the apparent mass, in grams, of the specimen and sinker in the immersion Iiquid. 4 © ISO 2004 - AII rights resen/ ed
  9. 9. Normen-DownIoad-Beuth-Kabdwal Book lmematianal Plot No. 1 79,042 Raigad C. .-KdNr. 7042865-LflVn5476745001—2011-09-28 09:55 ISO 1183-1:2004(E) The bouyancy of the suspension wire in air is normally considered to be negligible, but for correction for air bouyancy see Clause 6. 5.1.4.5 Perform the test on a minimum of three specimens and calculate the mean result to three decimal places. 5.2 Method B — Liquid pyknometer method 5.2.1 Apparatus 5.2.1.1 Balance, accurate to 0,1 mg. 5.2.1.2 Stationary support (see 5.1.1.3). 5.2.1.3 Pyknometer (see 5.1.1.7). 5.2.1.4 Liquid bath (see 5.1.1.8). 5.2.1.5 Dessicator, connected to a vacuum system. 5.2.2 Immersion Iiquid As specified in 5.1.2. -5.2.3 specimens specimens of powders, granules or flakes shall be measured in the form in which they are received. The specimen mass shall be in the range of1 g to 5 g. ' 5.2.4 Procedure i 5.2.4.1 Weigh the pyknometer (52,13) empty and dry. Weigh a suitable quantity of the plastic material in the pyknometer. Cover the test specimen with immersion Iiquid (5.2.2) and remove aII the air by placing the pyknometer in the desiccator (5.2.1.5) and applying a vacuum. Break the vacuum and almost completely fili the pyknometer with immersion Iiquid. Bring it to constant temperature [23 °C i 0,5 °C (or 27 °C : l: 0,5 °C)] in the Iiquid bath (5.2.1.4) and then complete filling exactlyto‘ the Iimit of the capacity of the pyknometer. Wipe dry and weigh thepyknometer with the specimen and immersion Iiquid. 5.2.4.2 Empty and clean the pyknometer. Fill il with deaerated distilled or deionized water, remove any remaining airas above, and determine the mass of the pyknometer and its contents al the temperature of test. 5.2.4.3 Repeat the process with the immersion Iiquid if an immersion Iiquid other than water was used. and determine its density as specifled in 5.1.4.3. 5.2.4.4 Calculate the density p3, in grams per cubic centimetre, of the specimen at 23 °C (or 27 °C), using the following equation: = 5521-. 4 ‘ (4) m1 —m2 PS where m5 is the apparent mass, in grams, 0t the specimen; m1 is the apparent mass, in grams, of the Iiquid required to fill the empty pyknometer; © ISO 2004 _— AII rights reserved 5
  10. 10. Nonnen-Download-Eeuth-Kabdvval Baok Intemalianal Plat No. 1 79,1342 Raigad Cu-Kdfln70428651fiVn5476745001-2011-09-26 09:55 '53.: ISO 1183-1:2004(E) m2 is the apparent mass, in grams, of the Iiquid required to fiIl the pyknometer containing the specimen; L is the density of the immersion Iiquid at 23 °C (or 27 °C). in grams per cubic centimetre, as stated by the supplier or determined as speoìfied in 5.1.4.3. ,5.2.4.5_ Perform the test on a minimum of three specimens and calculate the mean result to three decimal places. ' ' 5.3 Method C — Titration method 5.3.1 ‘Apparatus _5.3.1.1 Liquid bath (see 5.1.1.8). 5.3.1.2 Glass cylinder, of capacity 250 ml. 5.3.1.3 Thermometer, graduated at 0,1°C intervals, with a range suitable for measuring the test temperature used. 5.3.1.4 Volumetric flask, capacity 100 ml. 5.3.1.5 Flat-tipped glass rod stirrer. 5.3.1.6 Burette, capacity 25 ml, of a design which enables it to be kept in the liquid bath (5.3.1.1), capable of dispensing 0,1 ml portìons of liquid. . Immersion Iiquids Required are two miscible Iiquids of different densities. One shall have a density just below that of the test material and the other a density higher than that 0t the test material. Densities of various Iiquids are given in Annex A as a guide. If necessary, carry out a rapid preliminary test in a few millilitres of the Iiquid. The liquid with which the specimen comes into contact during the measurement shall have no effect on the specimen. 5.3.3 specimens specimens shall be in a suitable void-free form. 5.3.4 Procedure 5.3.4.1 By means of the volumetrie flask (5.3.1.4), accurately measure 100 ml of the less dense immersion Iiquid (see 5.3.2) into the clean, dry 250 mi glass cylinder (5.3.1.2). Put the cylinder into the iiquid bath (5.3.1.1) controlled et 23 °C i 0.5 ‘C (or 27 °O : l: 0,5 °C). 5.3.4.2 Plaoe the pieces of the test specimen in the cylinder. They shall fall to_ the bottom and be free of air bubbles. Allow the cylinder and its Contents to stabilize at the bath temperature, stirring at intervals. NOTE _ - It is recommended that the thermometer (5.3.1.3) be kept permanently in the liquid. This makes it possible to check that thermal equilibrium is attained et the time of measurement and, in particular, that the heat of dilution has been dissipated. ’ 5.3.4.3 When the temperature of the iiquid is 23 °C 10,5 °C (or 27 °C i 0,5 °C), add the more dense immersion Iiquid millititre by millilitre from the burette (5.3.1.6). Stir the iiquid after each addition by means of the glass rod (5.3.1.5), held vertically, and avoid producing air bubbles. After each addition of the more dense liquid and mixing, observe the behaviour of the pieces of test specimen. 6 e ISO 2004 - All rights reserved
  11. 11. Normen-DownIoad-Beuth-Kabdwl Boak lntemalîanal Plat No. 179x142 Raîgad C. .-KdNr.7042865-LfNr.5476745001-2011-09-25 09:55 ISO 1183-1:2004(E) At first, they wiII fall rapidiy to the bottom but. as more of the more dense Iiquid isadded, their rate of fall wiII become slower. At this point, add the more dense Iiquid in 0,1 ml amounts. Note the total amount of more -dense liquid added when the Iightest pieces of specimen become suspended within the Iiquid, at the Ievel to which they are brought by stirring, without moving up or down for at Ieast 1 min. At this point in the titration, note the amount of more dense Iiquid required. The density of the liquid mixture at this point corresponds to the lower Iimit of the density of the test specimen. Add more of the more dense liquid until the heaviest pieces of specimen remain ata constant Ievel within the Iiquid for at Ieast 1 min. Note the amount of more dense Iiquid required. For each pair of Iiquids, establish the relationship between the amount of more dense Iiquid added and the density of the resulting mixture, and plot the relationship in the form of a graph. ‘The density of the liquid mixture at each point on the graph can be determined by a pyknometer method. 6 Correction for buoyancy in air Where weighings are made in air, the yalues of the “apparent masses" obtained shaII be corrected to compensatefor the effect 0t the air buoyancy on the specimen and on any weights used. This wìll be the case if the accuracy of the results is to be between 0,2 % and 0,05 %. ‘The true mass mT, in grams, is calculated using the equation: flfl _ BEL) (5) mT = mApp X[1+ PS PL - where mApp is the apparent mass, in grams; p”, is the density, in grams per cubic centimetre, of air (approximately 0,001 2 g/ cm3 at 23 ‘C and 27 °C); ’ ‘ p5 is the density, in grams per cubic centimetre, of the specimen at 23 °C (or 27 °C); pL is the density, in grams per cubic centimetre, of the weights used. For ìmproved accuracy, the dependance of the density of air on pressure and temperature can be taken into account: ' ' pA. =_ÉP_QÉ_ÎLL_XL ' (s) " (1+0,00367xt) P where t is the test temperature, in degrees Celsius; P is the atmospheric pressure, in bars. © lSO 2004 - Al! rights reserved _ 7
  12. 12. Normen-Do wnIoad-Beum-Kabdwal Book International Plot No. 1 7937-42 Raîgad C. .-KdNr. TMZflGS-Lflvn 547674500140 11- 09-26 09:55 ISO 1183-1:2004(E) 7 Test report The test report shall include the following informalion: a) b) C) d) e) f) 9) a reference to this International Standard; all details necessary for complete identification of the material tested, including specimen preparation method and pretreatment, if applicable; the method used (A, B or C); the immersion Iiquid(s) used; the test temperature; the individual values and arithmetic mean of the density; a statement as to whether any buoyancy correction was made and, if so, what kind 0t correction. © ISO 2004 — AII rights reserved
  13. 13. Norman-DownIoad-Beuth-Kabdwal Baak lmemafianal Fiat No. 179;D-42 Raigad Cu-Kdfln 704286540113‘. 5476745001401 1-09-20 09:55 ISO 1 183-1 :2004(E) Annex A (informative) Liquid systems suitable for use in Method C WARNING . -—— Some of the following chemicals may be hazardous. Table A.1 —- Liquid systems for Method C Density range glcm“ 0,79 to 1,05 Isopropanollwater 0,79 to 1,00 MethanoI/ benzyl alcohol Isopropanol/ diethylene glycol Etha noi/ water 0,79 to 1,00 Toluenelcarbon tetrachlortde waterlaqueous solution of sodlum bromide a Water/ aqueous solution of calcium nitrato Ethanollaqueous solution of zinc chloride I’ 0,79 to 1,70 Carbon tetrachloride/1.3-dibromopropane 1,60 to 1,99 1,99 to 2,18 2,18 to 2,89 1,60 to 2,89 0,79 to 1,00 La-Dibromopropanelethylene bromide Ethylene bromide/ bromoform Carbon tetrachlorldelbromoform Isopropanol/ methylglycol acetato a A density of 1,41 is equivalent to a mass fraction of about 40 % sodium bromide. I’ A density of 1,70 is equivalent to a mass fraction of about 67 % zinc chloride. The following may also be used in various mixtures: Density (g/ cm3) n-Octane 0,70 Dimethylformamide 0,94 Tetrachloroethane 1 ,60 I Ethyl iodide 1,93 Methylene iodîde 3,33 ‘© ISO 2004 — AII rights reserved
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  15. 15. ISO 1183-1:2004(E) ICS 83.0801" Price baéed on 9 pages © ISO go-r-Au rights reserved ansa m3o. ».aîànfififluèîwnuvenuzvxud EDEN NYQGÈGE ÈÎ ÈSBNESS xoom ìiamxèswmîuszînsnaìoz

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